Carbureter.



1-. s. GOLDBERG.

CARBURETER. APPLICATION FILED MAR,9,19H.

. f Patented July 6, 1915. f

A IDVELTETI I John 5. Gulrjhar A110? ngs f I v mamas.

Q tural features which tend result of the provision'of a simpleeffective l'll ll fil hnv JOHN S. GOLDBERG, OF CHICAGO, ILLINGIS, ASSIGNOR TO STBOMBERGE MOTG'B DEVICES I COMPANY, 01? CHICAGO, ILLINOKS, A(JORPQBATION 01E ILIJINOIS.

caanuanrnn.

To all whom cit-may concern:

.1 Be it known that 1, JOHN citizen of the United States, residing atChicago, in the county of Cook and State of Illinois, have invented acertain new and useful Improvement in Carburetors, of which thefollowing is a full, clear, concise, and exact description,reference'being had to the accompanying drawingstorming a part of thisspecification.

My invention relates to 'carbureters and its object is to provide adevice.

To this end I contemplate S. GOLDBERG, a

numerous structo the general These structural feait may be said of mycarburetor that it is built along the general lines of a single axis,the various parts being nested one within another so that a compactarrangement is secured.

It is usual in the art at this time to provide c'arbureters withauxiliary air inlets which come into play when and only when suiiicientsuction has been created in the mix ing chamber by the suction of theengine as sociated therewith. It is evident to those skilled in the artthat this auxiliary air inlet must be valve-controlled and that thisvalve must be automatic in its operation and it is in connection withthis automatic valve that my invention provides distinctly new featuresof construction and operation.

It is significant in connection with my device that but one air inlet isprovided for the carbureter, the variations in the amount of airadmitted to the mixing chamber being se cured by changing the effectivepassageway rather than by-openin'g or closing a distinct and separateinlet. With this arrangement ll am enabled also to secure efi'ectivestart ing of the engine, by the provision of a valve in the one airinlet, as will be described. In connection with the air inlet controlmechanism 1 provide a new spring arrangement which is very efiective insecuring eiiicientoperation, this arrangement eliminating entirely theundesirable chattering which has been found so "frequently in valveswhich are designed to respond to changes in the pressure in the mixingchamber. As structural feature in this connection it will be noted thatI use the very part which defines the mixing zone for the air device offew parts. tures' are such that Application filed March '52, 1911.

generally improved vedge, as will be spanning the walls of Patented.July 6, 1915.

- Serial no. erases.

supply as the movable valve member which controls the existence and sizeof the supplemental air passage and, as will. be evident to thoseskilled in the art, the result is a simple and economical structure.

\Consistently with the other features of my invention 1 provide for theready and, com venient adjustment of the various parts'and for thecleaning thereof, the latter feature being directed mainly toward thenozzle from which the fuel is drawn. My invention is embodied in thedevice illustrated in the accompanying drawing, in which the figure isan axial sectionalview of my carbureter.

lhe main structural supporting element of my carburetor comprises twocastings, one disposed above the other and held together in a manner tobe described later. These two castings are notedin the drawings by thereference characters aand 5, the latter resting upon the former and thegasket 6 of compressible material intervening so as to provide a tightjoint. 7

The structural unit 4 comprises a shelf T and twocircular concentricwalls 8 and 9 extending upwardly therefrom, the former being providedwith an extension in the form of a housing 10 which will be referred tolater. Thecircular wall 9 forms the air passage which extends downwardlythrough the shell and which at-the top leads into the mixing chamber 11.A double conical hollow member 12 is disposed inside the wall 9 and thetop thereof rests upon the inwardly beveled edge 13 of the wall 9, which7 described later, constitutes a valve seat for the member 12. Thismember 12 is the Venturi tube which provides tor the constant air supplyand the middle of which constitutes the zone in which the oil used as afuel is sprayed, A. fuel tube 13 is supported in ax1al relation to thecircular wall 9 by means of a spider 1a, 15, preferably integral withthe tube and the wall. as a single casting. The tube can tendsdownwardly below the shelf 7 and is formed for the reception of a rod orpost 16 which is passed upwardly therethrough and is threaded at its endinto a bridge 17 the mixing chamber The head of the post 16 engages thethe tube 13 and it will be clear tie rod for holding in the relation ll.bottom of that the post terms a the castings a and 5 together red 16 andthe-sleeve. 20.

shown. The top of the'fuel tube 13 is beveled inwardly and a collar 18which is passed down over the' post '16 has a. correspondingly formedsurface resting thereon. This surface is provided with a plurality ofradial grooves 19, 19, through which, as

will be described, the oil is drawn by the action of the engine. TheVenturi tube 12, which has hereinbefore been referred to, is providedwith an internal. spider which has the axial sleeve 20 through which therod 16 passes, all as clearly illustrated in the figure It will be clearthat the Venturi tube has vertical movement and that this movement iselfectively guided by means of the The .member 12 has secured thereto a.downwardly extending rod 21 which passes through and its guided in anopening 22 in the spider 14. This rod is screw-threaded at its end forthe reception of a nut 24 and a helical spring ;2;? w*is disposed aboutthe rod between this'L-nut and the spider 14. This arrangement tends tohold the "member 12 upon its seat 13 and the amount of ten-. sion whichis exerted in'this behalf can be adjusted by "turning the nut 24 uponthe rod in an obvious manner; The nut 24; is provided with a transversesaw-cut 25 which is adapted for the reception of a cotter pin 26 whichmay be inserted in 1. transverse opening inthe'rod. In this way the nutmay be locked in any adjusted fposition. A helical spring 27 isdisposed, be tween the top of the collar 18 and the under side of thespider which connects the 'sleeve 20 with the tube 12. This spring tendsto lift the tube 12 from its seat and therefore acts in opposition tothe spring 23. It is thus seen that the valve formed by the tube 12 isbalanced between the tension of the two springs and the oppration willbe hereinafter described. 1

The "compartment between the circular walls 8 and-9 provides a floatchamber in which an annular float 28 is disposed. T is float is attachedto a swinging arm 29 which is pivotally mounted upon a pin 30 extendingacross the. end of the housing 10. As the float rises or lowers subjectto the level of the oil contained in the float chamber, the swingingmember 29 may respond by mov ing on its pivot. The member 29 is in theform of a yoke, and'carries a stamping 35. This stamping has acentralopenine'through which a valve stem 33 exte .ds, this valve stem havingthreaded engag ment with the stam ping. The stem fidextendsdownwardlythrough an opening 36 in the casing and, below this opening, is providedwith a. valvb piece 37. The valve piece is disposediiar a valve chamberor poclrt 38 which is closed by means of aplug 39 having threadedengagement with the casing. The plug 39 is provided with a pocket 40 anda helith'eoil .to be used as a fuel.

,the admission of more The air passageway through the tube 9 issupplemented at the bottom by a horrid? cal spring 41 is disposed-inthis pocket and is extended up to the valve sothat it may exert anupward pressure on the under sidethereof. It is clear that the valve 37cons.

trols the opening 36 and the stem is provided at its bottom end with atransverse passageway 42 with a pocxet 4:3- ingthe' casing which isinternally screw-threaded for the-reception of a union 4.4., this unionbeing suitably connected with the supply pipe45 which leads to the tankcontaining screen ddis provided inthe pocket 43 so as A. straining toprevent solid impurities from clogging float chamber, however, the fioatrises and this action, together with the spring, en-

'tirely, or at least nearly, closes the valve so as to cut off furthersupply. for the time be ing. As the oil becomes depleted the float dropsand the passagevgay 36 is opened for uel.

which is in the form of a horizontal pipe with a. vertical outlet.

passes downwardly through this 'verti cel outlet and through a.registering opening 18 in the bottom of the horn. The bottom oftendsbeyond. the casing proper and is pro vided at its end with a doubleoperating lever 53. This operating lever may be conits nected bysuitable linkages with operating- '1 mechanism within the control of theperson.

running the engine. The hub of the s am...

ingficver 53 is provided with a pair-cfnotches- 55, 55in either of whichaspiring pressed plunger 56, suitably mounted-inthe 1.1:? casing, may bedisposed. This plunger will hold the gate valve in either of its twoextrenie positions with reasonable security sof that it cannot be jarredor, accidentally moved out of place. Itwill'now be seen 5 that the aircomes in at the horn i7 and is there controlled by the gate valve 50. It

then passes upwardly through the central passageway defined bythe wall.9 and either and The fuel tube "528?;

chamber 11 and then passes on memes through the Venturi tube alone orboth through and around it, depending upon the position of'it relativeto the valve seat 13. The air then proceeds up to the mixing to theengine, the Connection between the mixingchamher and the engine beingcontrolled by a throttle valve 57 mounted upon a transverse shaft 58. II

The float chamber is connected with the interior of the fuel tube 13byzneans of the passageway 68, the passageway 69, and the restrictedpassageway 70. The last-named passageway is controlled by means of aneedle valve 71, the stem of which has threaded engagement with thecasing and extends out beyond the same where it is provided with afinger piece 72. A stuffing gland 73 may, be provided for obviouspurposes. When it is desired to adjust the flow of oil from the floatchamber into the interior of the fuel chamber 13' the finger piece 72may be ma nipulated in the desired direction so as to move the taperedend of the needle valve toward or away'from the openin 70. Thewall 9 isprovided with an enlargement 7a in the form of a vertical ridge and herea longitudinal passageway 75 is provided. This passageway connects withthe float chamber at the bottom and with the central air passage at thetop near the valve seat 13. When the Venturi tube 12 is down upon itsseat it is evident that all the air passing into the mixing chamber mustgo through the tube. The fuel nozzles 19 are disposed near therestricted area of the Venturi tube and as the air rushes upwardlythrough the. tube in response to the suction formed by the operation ofthe engine, oil will be withdrawn through thenozzles and volatizationwill take place' When the suction created by the engine reaches apredetermined point the tension of the spring 23, which tends to holdthe Venturi tube down on its seat, is overcome and the Venturi tubeisraised away from its seat. When it is in this position considerableair may rush through the annular supplemental passageway 'thus formedand the demands made by the engine may be met. As before stated, thespring 27 tends to lift the valve from its seat and it is thus clearthat this spring acts to assist the suction of the engine in thisrespect. "When the spring 23 is compressed the spring 27 is extended andthere is approximately no change in the tendency of the mechanical meansto hold the valve in a definite p0sition. In other words, the valve isbalanced between the tension of the two springs, the lower beingstronger than the other so that the valve may be retained normally onits seat. However, as the tension of one of the springs increases, thatof the other decreases and the amount of opposition to the suctionremains substantially if not quite lsageway 52,

adapted to the same. This effectually removes the un desirablechattering which has been found to be so prevalent in ,prior art devicesand permits a more accurate adjustment in the matter. of em amount oftension which the suction of the engine is required to over cornea thenthe Venturi tube 12 is lifted from its seat the oil passage 75 comesinto play and the air rushing causes further fuel to be picked up. The

by the opening carbureter isalso operative without the auxiliary airsupply being accompanied by a corresponding fuel supply. The carbureteris operative by"v reason of the other fuel inlets alone.

When it is desired to start the engine it is necessary to have a richmixture and in order to do this I provide means for concentrating mostof the suction of the engine upon the fuel inlet while admitting onlytalimited amount'of air. This is secured y means of the gate valve 50which. as be re described, is provided with a restricted pasthe -si-irwhich enters must enter by the restricted passage 59.. This actioncauses most of the suction to be concentrated upon the fuel inlet andcomparatively little air is provided. The closing of the valve 50 causesa considerable reduction of pressure. in the air'chamber below theautomatic valve and the valve cannot be lifted from its seat by thesuction in this starting action. Thus all the air entering the engine isconfined to the restricted passageway around the fuel noz zle, causing ahigh aspirating eliect with comparatitrely little air in quantity andconsequently t ric'h starting mixture.

I claim new and desire to secure ters Patent:

1. In a carburetor, a mixing chamber, an air passage leading to saidmixing chamber, a fuel. nozzle in said passage, an auxiliary air inletsurrounded by a valve seat, a valve partcontrolling said auxiliary airinlet and set upon said seat, resilient means tending to raise saidvalve part from said seat, aiid stronger resilient means tending to holdsaid valve part upon said seat.

2. In a carburetor, a mixing chamber, an air tube extending downwardlyfrom said mixing chamber and forming a valve seat at the top thereof, aspider extending across said air tube, a fuel tube carried by saidspider and mounted in axial relation to said air tube, a movable tubularmember normally resting upon the top of said air tube and surroundingpart of said fuel tube, and a spring between said spider and an elementcarried by said tubular member for holding said tubular member down onthe top of said air tube.

3. In a carbureter, a casing having an air inlet, a mixture outlet forconnection to an internal combustion engine,

by Letand a divided Q0 and when the gate is closed, all

- is open there will be substantially full at assage connecting saidinlet and outlet, one hranch of said passage being always open, a valvepart for controlling the other branch of said passage, said valve partbeing respoiisive to the higher suctions of the engine with which thecarbureter 15; connected, a

throttle in said mixture outlet, a fuel-nozzle disposed exclusively inthe first-named branch, and a manually-controlled valve in said airinlet, said air inlet being otherwise unobstructed so that when thevalve therein mospheric pressure exerted upon the underside of saidvalve part while the engine is operating regardless of the position ofthe throttle. v

4;. In a carbureter, a casing having an air inlet, a mixture outlet forconnection to an internal combustion engine, and a divided assageconnecting said inlet and said outet, one branch of said passage beingalways through said first-named branch but not sub ject to theaspirating efi'ect-of the air passing through said second-named branch,a throttle in said mixture outlet, and a manuallycontrolled valve insaid air inlet, said air inlet being otherwise unobstructed so that whenthe valve therein is open there will be substantially full atmosphericpressure exerted upon the underside of said valve part while the engineis operating regardless of the position of the throttle.

' 5. In a carburetor, a casing having an air inlet, a mixture outlet,and a divided pasmamas sage connecting said inlet and outlet, one branchof said passage being always open, a valve part for controlling theother branch of said passage, said valve part being responsive to thehigher suctions of the engine with which the carbureter is connected, athrottle insaid mixture outlet, a fuel-nozzle disposed exclusively inthe first -named branch, and a manually controlled valve in said airinlet, said manually'controlled valve when in its closed passageway fora minimum admission of air.-

6. In a carbureter, a casing having an air inlet, a mixture outlet forconnection to an internal combustion engine, and a divided passageconnecting said inlet and outlet, one branch of said passage beingalways open, a valve part for controlling the other branch of saidpassage, a spring tending to hold said'valve part in closed position,said valve part being responsive against the tension of said spring tothe higher suction's of the engine with which the carbureter isconnected, a throttle in said-mixture outlet, a fuel-nozzle disposedexclusively'in the first-named branch, and a manually-controlled valvein said air inlet, said air inlet being otherwise unobstructed so thatwhen the valve therein is open there ,will be'substantially fullatmospheric pressure exerted upon the underside of said-valvepart whilethe engine is operating regardless of the position of the throttle.

In witness whereof, I hereunto subscribe my name this 4th da of March,A. D. 1911.

' J O N S. GOLDBERG.

i/Vitnesses:

RAYMOND M. ANDERSON,

ARTHUR H. Bonrronnn.

position leaving a

